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Oksi-84 [34.3K]
3 years ago
13

Oceanside Bike Rental Shop charges a 18 dollar fixed fee plus 7 dollars an hour for renting bike. Jason paid 81 dollars to rent

a bike. How many hours did he pay to have the bike check out?
Mathematics
1 answer:
EleoNora [17]3 years ago
5 0

Answer:

9 hours.

Step-by-step explanation:

Let x represent number of hours.

We have been given that Oceanside Bike Rental Shop charges a 18 dollar fixed fee plus 7 dollars an hour for renting bike.

The cost of renting bike for x hours would be 7x.

The total cost of renting bike for x hours would be cost of x hours plus fixed charges that 7x+18.

We are told that Jason paid 81 dollars to rent a bike. To find the number of hours, we will equate total cost of renting bike for x hours by 81 as:

7x+18=81

Let us solve for x.

7x+18-18=81-18

7x=63

\frac{7x}{7}=\frac{63}{7}

x=9

Therefore, Jason paid for 9 hours to have the bike check out.

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louise bought 80 metres of fencing to make an enclosure for her pet dog .tommy if louise expects a rectangular enclosure what is
OleMash [197]

Answer:

400 m^2.

Step-by-step explanation:

The largest  area is obtained where the enclosure is a square.

I think that's the right answer because a square is a special form of a rectangle.

So the square would be 20 * 20  = 400 m^2.

Proof:

Let the  sides of the rectangle be x and y m long

The area A = xy.

Also the perimeter  2x + 2y = 80

x + y = 40

y = 40 - x.

So substituting for y in A = xy:-

A = x(40 - x)

A = 40x - x^2

For maximum value of A  we find the derivative and equate it to 0:

derivative A' =  40 - 2x = 0

2x = 40

x = 20.

So y = 40 - x

= 40 - 20

=20  

x and y are the same value so x = y.

Therefore for maximum area the rectangle is a square.

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3 years ago
(EASY TASK)
Ghella [55]

Answer: 8

Step-by-step explanation:

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2 years ago
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